HD 212710, also known as BD+85 383, SAO 3721, HR 8546, HIP 109693 is a star in Cepheus[1] with an apparent magnitude of 5.258[3] and a spectral type of B9.5 Vn,[4] indicating that it is a B-type main sequence star, giving it a blue hue. It's about 254 light-years far away from the solar system. It has about 2.61 times the mass of sun, 2.387 times the radius of sun and 53.79 times as luminous as sun.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cepheus[1] |
| Right ascension | 22h 13m 10.6136s[2] |
| Declination | +86° 6′ 28.6366″[2] |
| Apparent magnitude (V) | 5.258±0.009[3] |
| Characteristics | |
| Spectral type | B9.5 Vn[4] |
| U−B color index | -0.11[5] |
| B−V color index | -0.03[5] |
| Astrometry | |
| Radial velocity (Rv) | -6±5[6] km/s |
| Proper motion (μ) | RA: 60.554±0.202[7] mas/yr Dec.: 39.468±0.193[7] mas/yr |
| Parallax (π) | 12.8648 ± 0.1662 mas[7] |
| Distance | 254 ± 3 ly (78 ± 1 pc) |
| Absolute magnitude (MV) | 0.79[8] |
| Details | |
| Mass | 2.61+0.438 −0.254[9] M☉ |
| Radius | 2.387+0.086 −0.052[9] R☉ |
| Luminosity | 53.79±1.38[7] L☉ |
| Surface gravity (log g) | 4.0991±0.0652[9] cgs |
| Temperature | 10162+164.7 −134[9] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nomenclature edit
This star doesn't have a Bayer or Flamsteed designation.
It has a Chinese name, "Great Tianhuang Emperor" (Chinese: 天皇大帝, tiānhuángdàdì) which means "The Emperor of Heaven". It is an independent constellation in the system of Chinese constellations, belonging to the Purple Forbidden enclosure.[citation needed]
References edit
- ^ a b Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99: 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. S2CID 120559848.
- ^ a b van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
- ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urdan, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 335: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ a b Egret, D.; Didelon, P.; McLean, B. J.; Russell, J. L.; Turon, C. (1992). "The TYCHO Input Catalogue. Cross- matching the Guide Star Catalog with the HIPPARCOS INCA Data Base". Astronomy and Astrophysics. 258: 217–222. Bibcode:1992A&A...258..217E.
- ^ a b Mallama, A. (2018). "Erratum: Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 46 (1): 90. arXiv:1805.09324. Bibcode:2018JAVSO..46...90M.
- ^ Gontcharov, G. A. (2006). "Pulkovo compilation of radial velocities for 35495 stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
- ^ a b c d Gaia Collaboration (2022). "VizieR Online Data Catalog: Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)". Astronomy and Astrophysics. Bibcode:2022yCat.1355....0G.
- ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 255204555.
- ^ a b c d Paegert, Martin; Stassun, Keivan G.; Collins, Karen A.; Pepper, Joshua; Torres, Guillermo; Jenkins, Jon; Twicken, Joseph D.; Latham, David W. (2021). "TESS Input Catalog versions 8.1 and 8.2: Phantoms in the 8.0 Catalog and How to Handle Them". arXiv:2108.04778 [astro-ph.EP].